A solution consists of Acid and Water in the ratio 9 : 7 by volume. If we replace 32 litres of the solution by water, the new ratio of acid and water becomes 13 : 19. Find the quantity of acid (in liters) in the solution after the replacement.
1
51.6 L
2
50.4 L
3
47.5 L
4
49.3 L
5
46.8 L